Izuna Sarutobi (イズナ猿飛, Sarutobi Izuna) is the first son of Kireina Sarutobi and Sozen Uchiha and also a highly successful Chūnin of Konohagakure (木ノ葉隠れの里, Konohagakure no Sato; Hidden Leaf Village) and also one of many Captains (隊長, Taichō) of Konoha's Military Police Force however hidden behind this facade Izuna is the infamous Hi-Oni (火鬼, Fire Demon), reputable for his combat prowess, body count, and high proficiency in the field as well as his unprecedented mastery of Fire Release. Despite his age, he is widely known all across the continent as not a single opponent has survived an encounter with him.